Iori is an exceptional swordsman. He has pushed swordsmanship to the limits of what is humanly possible. Unfortunately for him Kanda is barely even human anymore. His Innocence has allowed him to transcend his limits and he has access to high speed regeneration in addition to superhuman speed and strength. Iori is a genius, but even he won’t be able to figure out a way to stop Kanda here. Kanda simply has too many advantages at his disposal and Iori would need something supernatural to defeat him. Kanda wins.